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The driver, who wasn't injured in the crash, had been waiting in the sidings for platform one to become available and after being given a signal he set off, the report said.

He drove towards the station, reaching 25mph, and although he had not seen a train leave the platform since speaking to the signaller he "formed the impression in his mind that the clearance of signal SN6006 meant that the route was set all the way into platform 1".

The report says the "stop" signal was clearly visible but the driver did not realise it applied to his train and drove past the two red lights.

He immediately tried to apply the brake after passing the signal but it was too late to stop automatic derailment, it said.